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Hall AJ, Barker DJ, Dangerfield PH, Taylor JF.Hall AJ, et al.Br Med J (Clin Res Ed). 1983 Dec 10;287(6407):1757-9. doi: 10.1136/bmj.287.6407.1757.Br Med J (Clin Res Ed). 1983.PMID: 6416578Free PMC article.
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